Bulletin ID: 2026-171-AWS
Scope: AWS
Content Type: Important (requires attention)
Publication Date: 11/05/2026 08:30 AM PST

Description:

GluonTS is an open-source Python library for probabilistic time series modeling.

We identified CVE-2026-119083, an issue in the archive extraction utility in GluonTS before 0.17.0. An actor who supplies a crafted tar archive containing symbolic or hard links might be able to write arbitrary files outside the intended extraction directory with the privileges of the extracting process.

Impacted versions: < 0.17.0

Resolution:

This issue has been addressed in gluonts version 0.17.0. We recommend upgrading to the latest version and ensuring any forked or derivative code is patched to incorporate the new fixes.

Workarounds:

If you cannot upgrade immediately, do not use GluonTS to extract tar archives from untrusted or unverified sources. As defense in depth, running on Python 3.14 or later causes TarFile.extractall() to apply the data extraction filter by default, which blocks the link-based traversal described here. Upgrading to 0.17.0 remains the recommended remediation.

References:

• CVE-2026-119083
• GHSA-rg2m-55pr-vp3q

Acknowledgement:

We would like to thank Udit Jain for collaborating on this issue through the coordinated vulnerability disclosure process.

Please email aws-security@amazon.com with any security questions or concerns.